How often do you find you need to switch your coils out? is it the typical every 30 mls? I've heard some people say 2 weeks which I think might be an overshot.. It holds 5 mls in it and I usually kill that or more in a day.. I use rda'S when I'm at home.. and I use the QUAD coil in the TFV4 when I'm out and about. It's rated 40-140 Watts.. Which I know it can handle which is quite impressive.. I like to vape it at 85 watts though, seems to be my sweet spot. So if you do use this coil or the Tri coil, both very similar that ones rated 30w-130w. How long do you keep it in there for? how many ml's? and for about how long? Thx guys.